210 



osborn: OLIGOCENE, MIOCENE, pliocene equid.e. 



of crown .036; m 1 a. p. .036, tr. .041, height of crown .029. Referred specimens. In addition scattered lower teeth, 

 numerous limb bones, and several nearly complete feet were found and referred to this species. 

 Type figure. — Text Fig. 171 of this Memoir. 



Characters. — (Barbour, p. 171) (1) The largest member of the genus known as yet, from one-fourth to one-eighth 

 larger than H. affinis. (2) Teeth noticeably more hypsodont; (3) teeth resembling those of Mesohippus bairdii grown 

 enormously large; (4) strong internal and external cingula on p 2 ^ 4 , cingula less apparent on m l ; (5) a cement reinforce- 



Fig. 171. Original figure of the type of Hypohippus matthewi Barbour, Morrill Coll. Univ. of Nebraska, 10-16-5-13, 

 superior dentition, p'-'-m 1 . Natural size. After Barbour, 1914, PI. 1. 



ment half way up the crowns; (6) metaloph uniting with ectoloph opposite mesostyle; (7) protoloph disconnected from 

 ectoloph in premolars but somewhat less in molars: (S) fossettes deep, bounding walls nearly vertical; (9) hypostyle 

 rudimentary, an elongate, loop-like expansion of postcingulum. 



A fore foot (Barbour, op. cit., 1914, pi. II) referred by Barbour to this species belongs to a species of Merychippus. 



